[Stgt-devel] segfault in the ssc code ...

[Richard Sharpe]

On Fri, Jul 25, 2008 at 11:01 PM, ronnie sahlberg
<ronniesahlberg at gmail.com> wrote:
> MMC also uses the media changer.
>
> Please verify that the example of "DVD jukebox" that is described in
> README.mmc still works
> after your changes to the mediachanger.

Hmmm, with the July 15 snapshot, and this set of commands:

# Create a DVD target ...
./usr/tgtadm --lld iscsi --op new    --mode target      --tid 2 -T iqn.2008-03.c
om.datalane-inc:storage.dvd1.tyan1U00.sys1

# Now the DVD drive
./usr/tgtadm --lld iscsi --op new    --mode logicalunit --tid 2 --lun 1 -Y cd
./usr/tgtadm --lld iscsi --op update --mode logicalunit --tid 2 --lun 1 --params
 vendor_id=STGT_DVD,product_id=DVD101,product_rev=0010,scsi_sn=STGTDVD01,removab
le=1

./usr/tgtadm --lld iscsi --op new    --mode logicalunit --tid 2 --lun 2 -b /mnt/
testing/virtual-tapes/smc --device-type=changer
./usr/tgtadm --lld iscsi --op update --mode logicalunit --tid 2 --lun 2 --params
 vendor_id=STK,product_id=L700,product_rev=0010,scsi_sn=STK0101,removable=1

# A data transfer unit ...
./usr/tgtadm --lld iscsi --op update --mode logicalunit --tid 2 --lun 2 --params
 element_type=4,start_address=1,quantity=1

./usr/tgtadm --lld iscsi --op update --mode logicalunit --tid 2 --lun 2 --params
 element_type=4,address=1,tid=1,lun=1

./usr/tgtadm --lld iscsi --op update --mode logicalunit --tid 2 --lun 2 --params
 element_type=1,start_address=16,quantity=1

./usr/tgtadm --lld iscsi --op update --mode logicalunit --tid 2 --lun 2 --params
 media_home=/mnt/testing/virtual-tapes

./usr/tgtadm --lld iscsi --op update --mode logicalunit --tid 2 --lun 2 --params
 element_type=2,start_address=1024,quantity=8

./usr/tgtadm --lld iscsi --op update --mode logicalunit --tid 2 --lun 2 --params
 element_type=2,address=1024,barcode=DVD00,sides=1
./usr/tgtadm --lld iscsi --op update --mode logicalunit --tid 2 --lun 2 --params
 element_type=2,address=1025,barcode=DVD01,sides=1
./usr/tgtadm --lld iscsi --op update --mode logicalunit --tid 2 --lun 2 --params
 element_type=2,address=1026,barcode=DVD02,sides=1
./usr/tgtadm --lld iscsi --op update --mode logicalunit --tid 2 --lun 2 --params
 element_type=2,address=1027,barcode=DVD03,sides=1

./usr/tgtadm --lld iscsi --op bind   --mode target      --tid 2 -I ALL
./usr/tgtadm --lld iscsi --mode target --op show

Which produces this output:

./usr/tgtadm --lld iscsi --op show --mode target
Target 2: iqn.2008-03.com.datalane-inc:storage.dvd1.tyan1U00.sys1
    System information:
        Driver: iscsi
        State: ready
    I_T nexus information:
        I_T nexus: 1
            Initiator: iqn.1994-05.com.redhat:2dc216ee3e97
            Connection: 0
                IP Address: 192.168.1.20
    LUN information:
        LUN: 0
            Type: controller
            SCSI ID: deadbeaf2:0
            SCSI SN: beaf20
            Size: 0 MB
            Online: Yes
            Removable media: No
            Backing store: No backing store
        LUN: 1
            Type: cd/dvd
            SCSI ID: deadbeaf2:1
            SCSI SN: STGTDVD01
            Size: 0 MB
            Online: No
            Removable media: Yes
            Backing store: No backing store
        LUN: 2
            Type: changer
            SCSI ID: deadbeaf2:2
            SCSI SN: STK0101
            Size: 0 MB
            Online: Yes
            Removable media: Yes
            Backing store: /mnt/testing/virtual-tapes/smc
    Account information:
    ACL information:
        ALL

I get this when trying to load a DVD into the transfer station:

 mtx -f /dev/sg4 load 1                                 mtx: Request
Sense: Long Report=yes
mtx: Request Sense: Valid Residual=no
mtx: Request Sense: Error Code=70 (Current)
mtx: Request Sense: Sense Key=Hardware Error
mtx: Request Sense: FileMark=no
mtx: Request Sense: EOM=no
mtx: Request Sense: ILI=no
mtx: Request Sense: Additional Sense Code = 15
mtx: Request Sense: Additional Sense Qualifier = 01
mtx: Request Sense: BPV=no
mtx: Request Sense: Error in CDB=no
mtx: Request Sense: SKSV=no
MOVE MEDIUM from Element Address 1024 to 1 Failed

(I get a different error with my changes ... dvdrecord says:)

Device seems to be: Generic mmc2 DVD-R/DVD-RW.
cdrecord: Found DVD+ media but DVD+R/DVD+RW support code is missing.
cdrecord: If you need DVD+R/DVD+RW support, ask the Author for cdrecord-ProDVD.
cdrecord: Free test versions and free keys for personal use are at
ftp://ftp.berlios.de/pub/cdrecord/ProDVD/
cdrecord: Sorry, no CD/DVD-Recorder or unsupported CD/DVD-Recorder
found on this target.
Using generic SCSI-3/mmc   CD-ROM driver (mmc_cd).
Driver flags   : MMC-3 SWABAUDIO BURNFREE
Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R16 RAW/R96P RAW/R96R
cdrecord: Track 1 has unknown length.
cdrecord: Use tsize= option in SAO mode to specify track size.